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36 votes
4 answers
5k views

Why are the edges of a broken glass almost opaque?

Unfortunately I broke my specs today which I used in this question. But I observed that the edges are completely different then the entire part of the lens. The middle portion of the lens was ...
Ankit's user avatar
  • 8,230
0 votes
0 answers
37 views

How does light pass through any glass? [duplicate]

This might be a very stupid question for Science students, but I had this doubt always, since childhood. I still don't understand even when I'm adult because I didn't read science in detail. When I ...
Vikas's user avatar
  • 109
5 votes
2 answers
4k views

Why can't ultraviolet light pass through glass?

What factor determine whether a body behaves like a transparent object for EM waves of a particular frequency?
user621951's user avatar
1 vote
0 answers
316 views

What are eclipse glasses made of? [closed]

What is the principle of eclipse glasses? Are they just high optical density plastic, or do they do something fancier? Could I make my own by taping ND filters into cardboard? I tried Googling ...
Yly's user avatar
  • 3,693
116 votes
6 answers
115k views

Why is glass transparent?

Once I asked this question from my teacher and he replied "Because it passes light.". "And why does it pass light?" I asked and he said, "Because it is transparent.". The same question again, Why ...
SMUsamaShah's user avatar
  • 5,377